Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c112fa3d7edcb2…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 06:44:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 53bc23c2de5431b94f7cb6034fa0087e SHA-1: 8ebdc21b8edef6fcc66b4f2fcc320708abf031e4 SHA-256: a3c112fa3d7edcb2265c224792bf52cc441b9ebe4baafe2965bc0596ed0ccc7a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a call-to-action phrase, directing users to websites that appear to be part of a link farm or scam. The primary URL, https://netcdn.online/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack, suggests a lure for free in-game currency, a common tactic for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack
    • https://lib.insan-unggul.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/free-tiktok-like_GM835599320.pdf
    • https://lib.insan-unggul.ac.id/repository/robux-gift-card-free_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/minecraft-server-hacks_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/roblox-rape-hack_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-hackcom-xyz_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/how-do-you-get-roebucks-for-free_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/free-robux-master_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-get-coin-master-card-free_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000504f.bin
9953412a0d7b6c7599ab06d15d3b83f708f6913b89ff12a002d90b668709c6a9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504F 27364 bytes
font_01_sfnt_off00008e83.bin
264ac3d9ee16189788a918c90b00fec891485e046f110455159a23ab28eb8c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 18864 bytes

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